Two Oregon sheriffs have written Vice President Joe Biden to say their departments won't enforce any new gun laws he considers unconstitutional.

In his letter, Sheriff Tim Mueller of Linn County said politicians are "attempting to exploit the deaths of innocent victims" by supporting laws that would harm law-abiding Americans. Crook County Sheriff Jim Hensley said later that day he sent the same letter.

"We must not allow, nor shall we tolerate, the actions of criminals, no matter how heinous the crimes, to prompt politicians to enact laws that will infringe upon the liberties of responsible citizens who have broken no laws," the letter says.